BS EN 1254-8 pdf free download

BS EN 1254-8-2021 pdf free download.Copper and copper alloys一Plumbing fittings Part 8: Press fttings for use with plastics and multilayer pipes.
When tested according to the method in 5.3.1.1 fitting bodies shall show no visual indication of leakage.
4.2.2 Requirements for liquid applications
4.2.2.1 Leak tightness under internal hydrostatic pressure
Fittings assessed as indicated in 4L1 are considered to be leak tight under internal hydrostatic pressure.
4.2.2.2 Leak tightness under vacuum
When tested according to the method in 5.3.2.1 the change in pressure shall not be greater than 0,05 bar at the conclusion of the test.
4.2.2.3 Leak tightness under temperature cycling (for heating networks)
When tested according to the method in 5.3.2.2 fittings shall show no signs of leakage or permanent distortion.
4.2.2.4 Resistance to pull-out
When tested according to the method in 5.3.1.2 the joint assemblies shall withstand the pull-out force without being separated and shall show no signs of leakage when subjected to the subsequent leak tightness under internal hydrostatic pressure test as described in 52J.
4.2.2.5 Leak tightness under internal hydrostatic pressure while subject to bending
When tested according to the method in 5.3.2.3 fittings shall show no signs of leakage or permanent distortion.
4.2.2.6 Leak before press
lithe manufacturer claims this feature, then when tested according to the method in 5.3.2.4 fittings shall leak at least one water drop per second.
4.2.3 Requirements for gas applications
4.2.3.1 Leak tightness under internal pneumatic pressure
Fittings assessed as indicated in 412 and 4..L3 are considered to be leak tight under internal pneumatic pressure.
4.2.3.2 Resistance to pull-out
When tested according to the method in 5.3.1.2 the joint assemblies shall withstand the pull-out force without being separated and shall show no signs of leakage when subsequently tested according to the method in 52.2 and/or 52.3 according to the application, fittings shall show no signs of leakage or permanent distortion.
4.2.3.3 Leak tightness under temperature cycling for fuel gas applications
When tested according to the test method in 5.3.3.1 fittings shall show no signs of leakage.
4.2.3.4 Leak before press
If the manufacturer claims this feature, then when tested according to the method in 5.3.3.2 fittings shall leak at least one bubble per second when tested pneumatically.
4.2.3.5 Press Fitting with elastomeric seals for fuel gas application inside buildings
The main aspect for the durability of tightness for fuel gas application inside buildings is the ozone behaviour of the elastomer. Therefore the elastomer shall be ozone resistant and comply with the requirements of EN 549 class B2 or higher.
4.2.3.6 Press fitting with elastomeric seals for fuel gas application outside buildings
The main aspect for the durability of tightness for fuel gas application outside buildings depends on the elastomeric sealing element. Therefore, the elastomer shall comply with the requirements of EN 682 types GAL or GBL.
4.3 Resistance to high temperature for fittings with elastomeric seals (for heating networks)
The main aspect for the resistance to high temperature liquid applications depends on the elastomeric sealing element. Therefore the elastomer shall have the appropriate characteristics as specified in EN 681-1. The elastomeric sealing elements shall conform to the requirements of EN 681-1:1996. Table 3 for continuous hot water supply up to 110 °C except for Isoprene-Isobutylene Copolymer (IIR) where a volume change in water up to and including 15 % is permitted.
4.4 Release of dangerous substances
National regulations on dangerous substances may require verification and declaration on release, and sometimes content, when construction products covered by this document are placed on those markets. In the absence of European harmonized test methods, verification and declaration on release/content should be done taking into account national provisions in the place of use.
NOTE An informative database covering European and national provisions on dangerous substances is available at the Construction website on EUROPA accessed through: http://ec.europa.eu/growth/ tools-databases/cp-ds.
4.5 Durability
4.5.1 DurabilIty of internal pressure: Resistance to stress corrosion
Fittings manufactured from copper and copper-tin-zinc alloys (CuSnZnPb) shall be considered to be resistant to stress corrosion according to EN 12502-2 and copper-zinc-silicon alloys containing  2 % Si are also considered to be resistant.
Fittings manufactured from CuZn-alloys shall be considered to be resistant to stress corrosion when the product has a hardness FIBW10 25/62,5 s 110 measured according to EN ISO 6506-1 or a hardness Ely5  134 measured according to EN ISO 6507-1.BS EN 1254-8 pdf download.